Wiki info about I-16 type 27

A single-seat cantilever monoplane with a composite construction and retractable landing gear.
The I-16 Type 27 is a variation of the I-16 Type 18 fighter equipped with an M-62 engine and the same wing-mounted cannon armament as on the I-16 Type 17, which was created based on the I-16 Type 10 in the same way.
The I-16 Type 27 was powered by the 9-cylinder air-cooled Shvetsov M-62 radial engine with a rated output of 800 hp. The engine possessed a double-speed central-drive supercharger which increased its altitude limit. The plane was equipped with the AV-1 variable-pitch propeller with a larger propeller spinner.
One important alteration was the installation of a rubber self-sealing cover on the fuel tank. This prevented fuel leaks caused by small arms fire.
The I-16 Type 27's armament consisted of two 20 mm rapid-firing Shpitalny-Vladimirov ShVAK aviation cannons with 150 shells each. The cannons were located in the wing's central section outside the propeller interference zone. The fuselage housed a portion of the cannons' ammunition. The cannons were fed by tubes located behind the fuselage's first former and running across the central wing section along a forward longeron.
Two more synchronized ShKAS cannons were installed under nacelles in the fuselage above the engine. They had 650 rounds each.
The new cannons led to an increase in the airplane's weight, and a corresponding reduction in its flight characteristics. For this reason, although the I-16 Type 27 was capable of aerial combat, it was mainly used to attack ground targets or as an interceptor.
The I-16 Type 27 was produced in small numbers in 1939. Only 59 were built in total. It saw limited use in the first stage of the Great Patriotic War, primarily as an attack aircraft.